A young lion hangs out with some newborn friends

What does a roar sound like when it comes from a baby lion?

This little big mouth tried to make some noise, and got the attention of his new enclosure-mates, four 7-day-old rare white lion cubs who were born at the Belgrade Zoo in Serbia.

The white cubs have been accepted by their mother, according to a zoo worker, and they join two other cubs, as well as four adult lions.